Preparation and Magnetic Properties of SrFe12O19 Ferrites Suitable for Use in Self-Biased LTCC Circulators
PENG Long1**, HU Yue-Bin2, GUO Cheng2, LI Le-Zhong1, WANG Rui1, HU Yun1, TU Xiao-Qiang1
1Sichuan Province Key Laboratory of Information Materials and Devices Application, Chengdu University of Information Technology, Chengdu 610225 2Post-Doctoral Innovation and Practice Base, Chengdu Industrial Vocational & Technical College, Chengdu 610213
Abstract：Strontium ferrites with different Bi2O3 content are prepared by the solid phase method, and their magnetic properties are investigated primarily. The Bi2O3 additive and sintering temperature separately exhibit a strong effect on the sintering density, crystal structure, and magnetic properties of the ferrites. As to the ferrites with 3 wt% Bi2O3, the relatively high sintering density ρs, saturation magnetization Ms, and intrinsic coercivity Hci can be obtained at a low sintering temperature of 900°C even much lower. Furthermore, the effective magnetic anisotropy constant Keff and magnetic anisotropy field Ha of the ferrites are calculated from the magnetization curve by the law of approach to saturation. It is suggested that the low-temperature sintered SrFe12O19 ferrites with Ms of 285.6 kA/m and Ha of 1564.6 kA/m possess a significant potentiality for applying in the self-biased low-temperature co-fired ceramics circulators from 34 to 40 GHz.
(Magnetic device characterization, design, and modeling)
引用本文:
. [J]. 中国物理快报, 2015, 32(01): 17502-017502.
PENG Long, HU Yue-Bin, GUO Cheng, LI Le-Zhong, WANG Rui, HU Yun, TU Xiao-Qiang. Preparation and Magnetic Properties of SrFe12O19 Ferrites Suitable for Use in Self-Biased LTCC Circulators. Chin. Phys. Lett., 2015, 32(01): 17502-017502.
2015, Vol. 32 
